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Vmux-2100 Installation and Operation Manual Chapter 4 Management from a Terminal
Configuring Main Link and Voice E1/T1 Ports 4-21
Main Link 1 or Main Link 2
1. Connect > (Yes)
2. Frame > (G.732S)
3. Restoration Time> (CCITT)
4. Clock Source> (Lbt (Local))
5. Interface Type> (Ltu)
6. Idle Code [0 - ff]... (ff)
@ - Db Update; # - Db Undo
ESC-prev.menu; !-main menu; &-exit
Figure 4-25. Main Link 1/2 Menu for E1 Port Module
3. From the Main Link 1/2 menu, configure the following E1 parameters:
Connect:
Yes (E1 link is enabled)
No (E1 link is disabled).
Frame (E1 framing mode):
G.732N (256N multiframe, 2 frames per multiframe, CRC-4 function
disabled)
G.732N-CRC4 (256N multiframe, 2 frames per multiframe, CRC-4
function enabled)
G.732S (256S multiframe, 16 frames per multiframe, CRC-4 function
disabled)
G.732S-CRC4 (256S multiframe, 16 frames per multiframe, CRC-4
function enabled).
Restoration Time (time required for the E1 port to return to normal
operation after sync loss):
1 Second (after 1 second, fast)
10 Second (as per requirements of AT&T TR-62411)
CCITT (as per requirements of ITU-T Rec.G.732).
Clock Source:
Lbt (derived from the received E1 signal)
Internal (received from the Vmux-2100 internal oscillator).
Interface Type (maximum attenuation of the Rx signal that can be
compensated for by the port Rx path, to obtain BER performance required
by the standards):
Ltu (maximum attenuation of 43 dB, relative to the nominal transmit
level of 0 dB, operates at longer ranges)
Dsu (maximum attenuation of 12 dB, relative to the nominal transmit
level of 0 dB).